[Swan-commit] Changes to ref refs/heads/master

[Andrew Cagney]

New commits:
commit 30b52bfffdbc8e3f11631c45f921ebc4c00f4787
Author: Andrew Cagney <cagney at gnu.org>
Date:   Fri Jul 20 16:41:03 2018 -0400

    building: only set SO_PRIORITY on systems that support it